.header-actions{display:flex;align-items:center;gap:12px}.account-button{border:1px solid var(--line);border-radius:30px;background:transparent;color:var(--ink);padding:15px 20px;font-size:14px}.account-button:hover{background:#192840}.header nav{gap:24px}.chat-section{border-top:1px solid var(--line)}.chat-workspace{display:flex;border:1px solid #2b3c58;border-radius:16px;overflow:hidden;height:590px;background:#101a2b}.chat-sidebar{width:260px;flex-shrink:0;padding:25px 18px;background:#0e1726;border-right:1px solid #2b3c58;display:flex;flex-direction:column;gap:10px}.chat-sidebar h3{font-size:20px;font-weight:500;margin:0 10px 20px}.chat-nav{display:flex;align-items:center;text-align:left;gap:14px;padding:16px 13px;border:1px solid transparent;border-radius:10px;background:none;color:#dce9ff;font-size:15px}.chat-nav>span:first-child{font-size:24px}.chat-nav.active{background:#1b3051;border-color:#354f77}.chat-nav small{display:block;font-size:12px;color:#9cb1ce;margin-top:6px}.chat-nav:hover{background:#172842}.chat-contact{font-size:12px;color:#abc6ee;margin:auto 10px 5px}.chat-room{flex:1;min-width:0;display:flex;flex-direction:column}.chat-room .messages{min-height:170px}.chat-room .bubble{max-width:82%}.chat-room #support-close{display:none}.chat-room .chat-head{padding:22px}.chat-room .chat-compose{padding:18px}.chat-room .chat-bottom{padding:0 18px 15px}.account-dialog{width:470px;max-width:94vw;border:1px solid #354764;border-radius:16px;padding:0}.account-body{padding:25px}.auth-tabs{display:flex;gap:8px;margin-bottom:25px}.auth-tabs button{flex:1;background:none;border:1px solid #334968;border-radius:7px;padding:12px;color:#c8d9f2;font-size:14px}.auth-tabs button.active{background:#274872;border-color:#7ba4dc;color:#fff}.account-body input{margin-bottom:18px}.account-body #auth-code{font-size:28px;letter-spacing:10px;text-align:center}.auth-secondary{display:flex;justify-content:space-between;gap:12px;margin-top:18px}.auth-secondary button,.account-logout{background:none;border:0;color:#a9c9f5;font-size:13px;padding:5px 0;cursor:pointer}.auth-secondary button:disabled{color:#7186a2;cursor:default}.account-logout{display:block;margin:20px auto 0}.account-body button:disabled{opacity:.55;cursor:default;transform:none}#auth-feedback{font-size:14px;line-height:1.65;color:#c3d9f9}.account-body .notice{font-size:13px}.chat-room .chat-head h3{font-size:18px}@media(max-width:1100px){.header nav{gap:15px}.header{margin:0 4%}.logo{font-size:28px}.account-button{padding:12px 15px}.header-actions{gap:8px}}@media(max-width:850px){.header{height:auto;min-height:90px;flex-wrap:wrap;padding:18px 0 0;gap:14px}.header nav{order:3;width:100%;padding:4px 0 16px;justify-content:space-between;overflow-x:auto;white-space:nowrap}.header nav a,.header nav a:nth-child(3),.header nav a:last-child{display:block;font-size:13px}.header-actions{margin-left:auto}.chat-sidebar{width:210px}}@media(max-width:650px){.chat-workspace{height:670px;flex-direction:column}.chat-sidebar{width:100%;padding:14px;border-right:0;border-bottom:1px solid #2b3c58;display:grid;grid-template-columns:1fr 1fr;gap:8px}.chat-sidebar h3,.chat-contact{display:none}.chat-nav{padding:12px 8px;gap:8px;font-size:13px}.chat-nav small{font-size:10px}.chat-nav>span:first-child{font-size:18px}.chat-room{min-height:0}.chat-room .chat-head{padding:16px}.chat-room .bubble{max-width:94%}.chat-room .chat-compose{padding:12px}.chat-room .chat-bottom{font-size:10px;padding:0 12px 12px}.chat-section .section-top{margin-bottom:24px}.account-body{padding:20px}.account-button{font-size:12px}.header nav{gap:18px}.header nav a{font-size:12px}.header .logo{font-size:26px}.chat-room .messages{min-height:100px}.chat-room .quick-questions{padding:0 12px 10px}}